Sight flow indicators offer an efficient means to visually monitor the state of liquids within industrial process lines. These indicators provide information on flow rate, flow direction, and the condition of the medium. Operators can observe the color and clarity of liquids through a window. Sight flow indicators can be equipped with various mechanisms to enhance visual observation, such as rotators for clear fluids, flappers for flow direction and intensity, and drip tubes for low flows. Additionally, Teflon-lined sight flows are utilized in corrosive environments to protect against chemical reactions.